Influence of laser surface texturing on adhesive bonding: a comprehensive review on surface morphology and strength enhancement

The strength of adhesive bonded parts is governed by various factors, with substrate surface treatment being a pivotal determinant due to its profound influence on bond performance. Among the available surface preparation methods, laser surface treatment has emerged as a highly promising technique, owing to its adaptability to diverse materials, cost-effectiveness, and environmentally friendly approach. Despite its potential, the effectiveness of laser surface treatment is highly dependent on material properties, processing parameters, and environmental conditions. This review provides an in-depth evaluation of the role of laser surface texturing in enhancing surface morphology, surface chemistry and adhesive bonding strength. Drawing on a critical analysis of recent studies, it consolidates findings on surface roughness, surface chemistry and mechanical properties, shedding light on the effects of laser processing parameters across a broad range of materials. Results are presented in a comprehensive tabular format, offering insights into the adaptability of laser surface texturing for various material systems. This review underscores laser surface texturing as an innovative and effective approach to improving both the surface characteristics of substrates and the mechanical performance of adhesive-bonded joints.